CBSE > Class 11 > Physics | CBSE Board | Homework Help

Ask questions which are clear, concise and easy to understand.

Ask Question

what is called differentiation

Posted by Mahaveer Sankhla 6 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Sarthak Agarwal 6 years, 8 months ago

Dividing up an equation

3Thank You

ANSWER

Y=x+1/x^2 then dy/dx=what

Posted by Sakshi Sinha 6 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Sonam Malik 6 years, 8 months ago

-1/x^2 - 2/x^3

0Thank You

ANSWER

Working of anteena

Posted by Himanshi Dafouty 6 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is meant by capillarity? Derive an expression for the rise of a liquid in a capillary tube.

Posted by Ningthicham Sanacham 6 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 6 years, 8 months ago

Capillarity is a physical phenomenon in which liquids flow without the help of gravity. Liquids even rise to a height against gravity, through narrow tubes.

Capillary action is due to the phenomenon of Surface tension of liquid as well as adhesive forces between liquid molecules and molecules of the narrow tube. Surface tension is due to cohesive attraction among liquid molecules.

Derivation: When a thin (open or closed at the top) tube is inserted into a liquid in a container, the liquid inside the tube rises to a height h above the liquid surface outside. Let the diameter of the tube be D. The density of liquid be ρ. The surface tension of the liquid be S.
Weight of liquid column acting downwards = m g
        W = ρ (πD²/4) h g     --(1)
The surface on the top liquid inside the capillary tube has a trough (cup) like shape. Assume the angle of contact with the walls be Ф. Surface tension is the contact force per unit length along the circumference of top surface. This force pulls the liquid vertically upwards.
    Force upwards = S * πD * CosФ ----- (2)
=>    h = 4 S CosФ / (ρ D g)

0Thank You

ANSWER

Draw a graph to show that variation of pE, KE and total energy of a simple harmonic oscillator with displacement?

Posted by Anurag Yadav 6 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

How many percent need for bio stream?

Posted by Daya Ram 6 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Sapna Jain 6 years, 8 months ago

Kha se

1Thank You

ANSWER

When ntse result come

Posted by Shikha Sharma 6 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Convert phy node to cgs unit using dimension formula

Posted by Riya Bisht 6 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

The clock used to maintain Indian Standard Time is

Posted by Manish Prasad 6 years, 8 months ago

CBSE > Class 11 > Physics

2 answers

Sarthak Agarwal 6 years, 8 months ago

Cesium atomic clocks

0Thank You

Aryan Bharti 6 years, 8 months ago

Atomic clock

1Thank You

ANSWER

When will board result declare

Posted by Shad Khan 6 years, 8 months ago

CBSE > Class 11 > Physics

2 answers

Dhama ...? 6 years, 8 months ago

No aish....in third week of may

2Thank You

Aish 753❤ 6 years, 8 months ago

In first week of may

2Thank You

ANSWER

An object is in uniform motion along a straight line. What will be the position - time graph for the motion of the object if (a) X0 = +ve, V = +ve (b) X0 = +ve, V=-ve (c) X0 = -ve, V=+ve (d) both X0 and V are -ve. the letters X0 and V represent position of the object at t=0

Posted by Mannu Shah5678 6 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Find out excess of pressure inside a liquid drop

Posted by Clash With Sanjeev 6 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Explain and formulate total energy of a satellite and binding energy of a satellite

Posted by Clash With Sanjeev 6 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

State and prove parallel axes theorem

Posted by Clash With Sanjeev 6 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

State and prove principle pf conservation of linear momentum

Posted by Tazeem Najar 6 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Ravi.....✌️ Ivar......? 6 years, 8 months ago

Principle of Conservation of Linear Momentum. The principle of conservation of linear momentum states that, If no external forces act on the system of two colliding objects, then the vector sum of the linear momentum of each body remains constant and is not affected by their mutual interaction.

1Thank You

ANSWER

class 11 important derivations

Posted by Murtaza Haider Hasan 6 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

kya kisi ke pass class 11 physics previous year questions paper ke solutions hai mujhe bhot zarurat hai plz

Posted by Murtaza Haider Hasan 6 years, 8 months ago

CBSE > Class 11 > Physics

2 answers

Murtaza Haider Hasan 6 years, 8 months ago

plz mujhe dedo na solutions mujhe bhot zarurat hai plz

1Thank You

Shabbo Naaz 6 years, 8 months ago

Haa

6Thank You

ANSWER

Define dimensional formula

Posted by Purnima Chutani 6 years, 8 months ago

CBSE > Class 11 > Physics

2 answers

Purnima Chutani 6 years, 8 months ago

Thnks

1Thank You

Praneetha Ravula 6 years, 8 months ago

Dimensional formula of a physical quantity is an expression showing how and which fundamental or base quantities represent the dimensions of the given physical quantity.

1Thank You

ANSWER

Y=A/2 sin 2 pi lambda t

Posted by Abhishek Narayanan 6 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

an AC source is connected in parallel with LCR circuit as shown in figure then first option VS is equal to VR plus Vl l + Vc second option Is is equal to IR + I I see third option IR is less than IAS and fourth option a real pic may be greater than is

Posted by Ranju Gupta 6 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Please name the book which are required in bio stream so I can buy

Posted by Daya Ram 6 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Sonam Malik 6 years, 8 months ago

NCERT is must

1Thank You

ANSWER

Why sky are blue

Posted by Dhananjay Tembhurne 6 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Kaushal Varnawal 6 years, 8 months ago

It is just because of the scattering of the light.Sun rays coming from the sun gets a scattering of most of the blue light as the blue light has the shortest wavelength due to it scatters most.(The air has colloidal particals in it.)

1Thank You

ANSWER

Why are rain drops always spherical?

Posted by Vishal Kumar 6 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 6 years, 8 months ago

Raindrops take up the spherical shape due to the surface tension of water which is caused due to the tendency of water molecules to stick together. The spherical shape is having the least possible surface area due to which it can resist any of the external force in the atmosphere.

1Thank You

ANSWER

Law of constant proportion

Posted by Achint Mishra 6 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 6 years, 8 months ago

The law states that in a chemical substances the elements are always present in a definite proportion by mass. It is also termed as law of definite proportion.
For instance, the ratio of hydrogen and oxygen in water obtained from any source is 1:8 i.e. 1g of hydrogen and 8g of oxygen together make up 9g of water.
Similarly the ration of nitrogen and hydrogen in ammonia is 14:3.

1Thank You

ANSWER

What is physical unit definition?

Posted by Mohan Ram 6 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Praneetha Ravula 6 years, 8 months ago

Standard measure of a physical quantity is called physical unit.

2Thank You

ANSWER

What's the best book to prepare for jee mains and advanced???

Posted by Praneetha Ravula 5 years, 8 months ago

CBSE > Class 11 > Physics

3 answers

Ibthisam I ?? Save Farmers 6 years, 8 months ago

You can even try DPPs from Kota. DPP-Daily Practice Papers.

2Thank You

Prabhakar Suman 6 years, 8 months ago

Ncert +ncert exampler +hcv +pyqb

1Thank You

Vivek Singh 6 years, 8 months ago

Yes

2Thank You

ANSWER

How can direction of instantaneous acceleration be determined?

Posted by Praneetha Ravula 6 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Ravi.....✌️ Ivar......? 6 years, 8 months ago

Subtract the later vector from the earlier, and divide by the infinitesimally small time interval. The resulting vector is the instantaneous acceleration (in the limit that the time interval goes to zero). The direction of that vector is the direction of the acceleration.

2Thank You

ANSWER

When will school start 11th class??

Posted by Daya Ram 6 years, 8 months ago

CBSE > Class 11 > Physics